Howmet Fastening Systems
Howmet Fastening Systems
Phone: Sales +1 800 992 4444
Technical Support +1 310 784 6409
Email: HFSTechSupport@howmet.com
Website: www.hfs.howmet.com
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THREAD: AS8879
MATERIAL: A286 corrosion resistant steel per AMS 5525 or AMS 5732 (UNS S66286). Heat treat - Rc 33-44.
FINISH: Silver plate per AMS 2411.
PERFORMANCE: NASM25027
H31 Wrenchable Hex Nut
Unit of Measure
1 

Item #

C - REF

H - MAX

V - REF

W

Approx. Weight (LBS/100)

Thread

Part Family

H31-04 N/A 0.289 N/A 0.125 N/A 0.094 N/A 0.252 in0.252-0.240 N/A 0.080 N/A 0.1120-40 UNJC-3B N/A H31
H31-06 N/A 0.361 N/A 0.141 N/A 0.111 N/A 0.314 in0.314-0.302 N/A 0.160 N/A 0.1380-32 UNJC-3B N/A H31
H31-6 N/A 0.649 N/A 0.282 N/A 0.207 N/A 0.564 in0.564-0.553 N/A 1.010 N/A 0.3750-24 UNJF-3B N/A H31
H31-7 N/A 0.794 N/A 0.328 N/A 0.240 N/A 0.690 in0.690-0.679 N/A 1.830 N/A 0.4375-20 UNJF-3B N/A H31
Unit of Measure
1